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Test Info:
- Manifest: dom/base/test/chrome/chrome.toml
<?xml version="1.0"?>
<?xml-stylesheet
  type="text/css"?>
<!--
-->
  <script type="application/javascript"
<a target="_blank"
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
</pre>
</body>
<script class="testbody" type="application/javascript">
<![CDATA[
// eslint-disable-next-line mozilla/no-addtask-setup
add_task(async function setup() {
  await SpecialPowers.pushPrefEnv({ set: [[ "dom.file.createInChild", true ]]});
});
add_task(async function test() {
  var file = SpecialPowers.Services.dirsvc.get("CurWorkD", Ci.nsIFile);
  // man I wish this were simpler ...
  file.append("chrome");
  file.append("dom");
  file.append("base");
  file.append("test");
  file.append("chrome");
  file.append("fileconstructor_file.png");
  let domFile = await File.createFromFileName(file.path);
  ok(File.isInstance(domFile), "File() should return a File");
  is(domFile.type, "image/png", "File should be a PNG");
  is(domFile.size, 95, "File has size 95 (and more importantly we can read it)");
  domFile = await File.createFromNsIFile(file);
  ok(File.isInstance(domFile), "File() should return a File for an nsIFile");
  is(domFile.type, "image/png", "File should be a PNG");
  is(domFile.size, 95, "File has size 95 (and more importantly we can read it)");
  try {
    await File.createFromFileName(
      "i/sure/hope/this/does/not/exist/anywhere.txt"
    );
    ok(false, "Attempt to construct a non-existent file should fail.");
  } catch (ex) {
    is(
      ex.result,
      Cr.NS_ERROR_FILE_UNRECOGNIZED_PATH,
      "Constructing a non-existing file should fail with the correct error code"
    );
  }
  let dir = SpecialPowers.Services.dirsvc.get("CurWorkD", Ci.nsIFile);
  try {
    await File.createFromNsIFile(dir);
    ok(false, "Attempt to construct a file from a directory should fail.");
  } catch (ex) {
    is(
      ex.result,
      Cr.NS_ERROR_FILE_IS_DIRECTORY,
      "Constructing a file from a directory should fail with the correct error code"
    );
  }
})
]]>
</script>
</window>